Revisión de Compatibilidad con Linux

The Edimax EW-7811UN USB Wireless adapter has the USB ID 7392:7811 and is fully supported since Ubuntu 11.10. The stick can be used with WPA2 encryption and 802.11n. The device is also shipped with different branding, although the hardware is identical. The following devices are identical to the Edimax EW-7811UN:

Realtek Module 8192cu

If the EW-7811UN stick is used with older distributions it might be necessary to use the Edimax original drivers together with NdisWrapper.
Furthermore, one can use the original Realtek drivers. If the Realtek driver is used instead of the module which is part of the standard kernel, the automatic loading of the kernel module has to be inhibited. To achieve this, the rtl8192cu driver provided by the standard kernel has to be blacklisted in the file /etc/modprobe.d/blacklist.conf by adding the following line:

blacklist rtl8192cu

The module from the Realtek homepage is called 8192cu and has to be compiled by hand. Under Ubuntu compilation will need the build-essentials to be installed:

sudo apt-get install build-essential

Compilation will be achieved by the install script that is part of the downloaded file:

sudo sh install.sh

The compiled driver can be loaded by the command

sudo modprobe 8192cu

Due to a bug in the power management of the 8192cu driver the connection can drop if the device is set to power save mode. This can be seen in the log files: